4. With an Ah-So tool
For the uninitiated, the Ah-So is a small tool with two flat prongs, one slightly longer than the other, that are attached to an oval handle. Check out the video above for a demo — it doesn't even require that you pierce the cork. Essentially the prongs get wedged between the cork and the bottle and, once secure, you use it to twist the cork right out. True, it's something that you would have to have handy, but if you're a gadget-minded wine geek this is a good tool to invest in (it only costs about $5-$7) should you misplace your fancy corkscrew(s).
5. With a serrated knife
Although it doesn't involve breaking the bottle in a Champagne sabering kind of way, this technique still comes with a cautionary disclaimer. Ideally you're looking for a thin knife here that is going to fit between the neck of the bottle and the cork. Once the blade is wedged between the cork and the bottle neck slowly wiggle the cork back and forth, twisting the bottle slightly around as you gently pull upwards.
Haven't seen the first five ways yet? Click here to check it out.